AP1186T5-33L-U Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The AP1186T5-33L-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 3.3V output at 1.5A in a TO-220-5 package. This device provides positive fixed output regulation with integrated over-current and over-temperature protection. The part is currently discontinued at DiGi Electronics, making identification of equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

AP1186T5-33L-U

Diodes IncorporatedIn Stock: 985AP1186T5-33L-U Datasheet

Current PartRFQ

AP1186T5-33L-U

Diodes IncorporatedIn Stock: 985AP1186T5-33L-U Datasheet

Parametric EquivalentRFQ

LT1963AET-3.3#06PBF

Analog Devices Inc.In Stock: 1225LT1963AET-3.3#06PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1186T5-33L-U is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 1.5A minimum
• TO-220-5 package for mechanical and thermal compatibility
• Maximum input voltage rating of 16V or higher
• Protection against over-current and over-temperature conditions
• Through-hole mounting configuration

The LT1963AET-3.3#06PBF from Analog Devices Inc. qualifies as a manufacturer-recommended substitute based on matching these core electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The LT1963AET-3.3#06PBF is the appropriate substitute for the discontinued AP1186T5-33L-U. Both devices meet the core functional requirements: fixed 3.3V output, 1.5A current delivery, and TO-220-5 package compatibility. The LT1963AET-3.3#06PBF maintains active product status with established supply availability, ensuring long-term procurement viability.

Both parts are ROHS3 compliant and carry identical REACH and ECCN classifications, supporting equivalent regulatory compliance in end applications. The LT1963AET-3.3#06PBF offers enhanced input voltage tolerance (20V vs. 16V maximum) and includes reverse polarity protection, providing additional design margin and fault tolerance.

Frequently Asked Questions (FAQ)

Q: Can the LT1963AET-3.3#06PBF directly replace the AP1186T5-33L-U in existing designs?

A: Yes. Both devices deliver 3.3V at 1.5A in identical TO-220-5 packages with matching pin configurations. Electrical performance is equivalent for standard linear regulator applications within the specified operating parameters.

Q: What are the differences in operating temperature ranges?

A: The AP1186T5-33L-U operates from 0°C to 150°C (junction temperature), while the LT1963AET-3.3#06PBF operates from -40°C to 125°C. Design applications requiring operation above 125°C junction temperature must retain the original AP1186T5-33L-U or verify thermal management compatibility with the LT1963AET-3.3#06PBF.

Q: How do the dropout voltages compare?

A: The AP1186T5-33L-U specifies 0.38V dropout at 1.5A, while the LT1963AET-3.3#06PBF specifies 0.55V at the same current. Applications with tight input voltage margins should account for this 0.17V difference in minimum input voltage requirements.

Q: Are there differences in quiescent current consumption?

A: Yes. The LT1963AET-3.3#06PBF draws 1.5 mA quiescent current compared to 10 mA for the AP1186T5-33L-U. This represents a significant reduction in standby power consumption, beneficial for battery-powered or low-power applications.

Q: Do both parts have equivalent protection features?

A: Both include over-current and over-temperature protection. The LT1963AET-3.3#06PBF adds reverse polarity protection, providing enhanced fault tolerance. The AP1186T5-33L-U also includes an enable control feature not listed for the LT1963AET-3.3#06PBF.

Q: What is the significance of the TO-220-5 package?

A: The TO-220-5 package is a through-hole, three-terminal linear regulator package with two additional pins for input and output filtering. Both devices use this identical package, ensuring mechanical and thermal compatibility in PCB layouts and heat sink mounting configurations.